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The Climate Crisis Prof. Stefan Rahmstorf Potsdam Institute for Climate Impact Research Foto: S. Rahmstorf
Rise of CO 2  concentration
Oceans are getting acidic ,[object Object],Plankton Korallenriffe
CO 2  is a Greenhouse Gas “ Climate Sensitivity” Arrhenius 1896   (4-6  ºC ) 3  ± 1  ºC   Human-caused forcing until now should have caused   0,7 – 0,9 ºC  warming
Global Temperature Global warming predicted (Sawyer,  Nature   1972 , Broecker,  Science   1975 )
Global Temperature in April 2010 1880-1920
Solar activit y We’re in the longest and deepest minimum of solar activity since at least 30 years.
The next 100 years A2 B1 A1FI High Emissions Lower Emissions
 
1979
2007
Shrinking Arctic Sea Ice 1900  1950  2000  2050  2100 Year 0 2 4 6 8 10 Ice Area (Sept. minimum), millions of km 2 Observations IPCC models Model  range 2009?
M u e l l e r  G l a c i e r
Sea Level Rise Tide Gauges Gauges: Church & White Satellite: Cazenave et al. Sizewell B nuclear power station, Great Britain 20 cm rise since 1880
Rising Faster than Expected
Melting corresponds to 7 m global sea level rise! Greenland
Recent Sea Level Estimates Delta Comm. WBGU Data Data: Church and White (2006) Scenarios 2100: 50 – 140 cm (Rahmstorf 2007) 55 – 110 cm (“high end”, Delta Commission 2008) Scenarios 2200: 150 – 350 cm (“high end”, Delta Commission 2008) Scenarios 2300: 250 – 510 cm (German Advisory Council on   Global Change, WBGU, 2006) Rahmstorf
Impacts of sea level rise Han, main island of  Carteret-Atoll Tuvalu Birma, Typhoon  Nargis  (2008)
The 2  ºC Guardrail A2 B1 A1FI 2 ºC limit
[object Object],[object Object],[object Object],[object Object],Meinshausen et al 2009
Thank you for listening! Foto: S. Rahmstorf

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The Climate Crisis

  • 1. The Climate Crisis Prof. Stefan Rahmstorf Potsdam Institute for Climate Impact Research Foto: S. Rahmstorf
  • 2. Rise of CO 2 concentration
  • 3.
  • 4. CO 2 is a Greenhouse Gas “ Climate Sensitivity” Arrhenius 1896 (4-6 ºC ) 3 ± 1 ºC Human-caused forcing until now should have caused 0,7 – 0,9 ºC warming
  • 5. Global Temperature Global warming predicted (Sawyer, Nature 1972 , Broecker, Science 1975 )
  • 6. Global Temperature in April 2010 1880-1920
  • 7. Solar activit y We’re in the longest and deepest minimum of solar activity since at least 30 years.
  • 8. The next 100 years A2 B1 A1FI High Emissions Lower Emissions
  • 9.  
  • 10. 1979
  • 11. 2007
  • 12. Shrinking Arctic Sea Ice 1900 1950 2000 2050 2100 Year 0 2 4 6 8 10 Ice Area (Sept. minimum), millions of km 2 Observations IPCC models Model range 2009?
  • 13. M u e l l e r G l a c i e r
  • 14. Sea Level Rise Tide Gauges Gauges: Church & White Satellite: Cazenave et al. Sizewell B nuclear power station, Great Britain 20 cm rise since 1880
  • 15. Rising Faster than Expected
  • 16. Melting corresponds to 7 m global sea level rise! Greenland
  • 17. Recent Sea Level Estimates Delta Comm. WBGU Data Data: Church and White (2006) Scenarios 2100: 50 – 140 cm (Rahmstorf 2007) 55 – 110 cm (“high end”, Delta Commission 2008) Scenarios 2200: 150 – 350 cm (“high end”, Delta Commission 2008) Scenarios 2300: 250 – 510 cm (German Advisory Council on Global Change, WBGU, 2006) Rahmstorf
  • 18. Impacts of sea level rise Han, main island of Carteret-Atoll Tuvalu Birma, Typhoon Nargis (2008)
  • 19. The 2 ºC Guardrail A2 B1 A1FI 2 ºC limit
  • 20.
  • 21. Thank you for listening! Foto: S. Rahmstorf

Notes de l'éditeur

  1. Abbildung 4.3-1 Aragonitsättigung und gegenwärtige Riffstandorte von Warmwasserkorallen (blaue Punkte). (a) vorindustrielle Werte (ca. 1870, atmosphärische CO2-Konzentration 280 ppm), (b) Gegenwart (ca. 2005, 375 ppm CO2), (c) Zukunft (ca. 2065, 517 ppm CO2). Der Grad der Aragonitsättigung ( Ù ) bezeichnet das relative Verhältnis zwischen dem Produkt der Konzentrationen von Kalzium- und Karbonationen und dem Löslichkeitsprodukt für Aragonit. Standorte mit einer Aragonitsättigung unterhalb von 3,5 sind nur noch bedingt für riffbildende Warmwasserkorallen geeignet (marginal), unterhalb von 3 sind sie ungeeignet. Quelle: Steffen et al., 2004
  2. Nur ein Jahr war in den letzten 130 Jahren w ärmer als 2009 In der S üdhalbkugel war 2009 das wärmste Jahr!
  3. Moberg mit Sedimenten für den langfristigen Trend Oerlemans: Gletscher Aus den Punkten 1-3 folgt fast zwangsl ä ufig diese weitere Erw ä rmung
  4. Gestrichelt: vor 100 Jahren. Zu sehen aus Moränen und direkter Beobachtung
  5. Rise relative to 1990 level.
  6. Tuvalu: 11,000 Einwohner. Carteret: siehe http://www.spiegel.de/wissenschaft/natur/0,1518,560801,00.html Insel Han, 1500 Einwohner, in 2008 in zwei Teile gebrochen. Geh ört zu PNG. “Umsiedlung nach Bougainville unvermeidlich.”
  7. Moberg mit Sedimenten für den langfristigen Trend Oerlemans: Gletscher Aus den Punkten 1-3 folgt fast zwangsl ä ufig diese weitere Erw ä rmung